Liberación de solicitudes de compra en SAP a través de una aplicación web creada en Web Dynpro ABAP

El objetivo principal del TFC es crear una aplicación Web a través de la herramienta que facilita SAP en su versión SAP ECC 6.0 y siguientes, denominada Web Dynpro ABAP (en adelante WDA). WDA es el recurso tecnológico que ofrece la plataforma para manejar la capa de presentación de las aplicaciones, es decir, la interfaz de usuario de las aplicaciones Web. WDA provee un conjunto de herramientas para modelar y diseñar las interfaces de usuario basándose en el paradigma MVC (Model View Controler).L'objectiu principal del TFC és crear una aplicació web a través de l'eina que facilita SAP en la seva versió SAP ECC 6.0 i següents, denominada Web Dynpro ABAP (d'ara endavant WDA)

The economic value of flood risk regulation by agroecosystems at semiarid areas

Agroecosystems are anthropized ecosystems that provide food and other benefits to society known as ecosystem services (ES). Among these services is the Ecosystem Service for Flood Regulation (ESFR). This regulation service has been scarcely studied in the scientific literature, which has mainly focused on factors such as land use patterns and intermediate indicators. This implies that key physical aspects that condition the development of floods and their impact on society have been ignored. The aim of this work is to develop a methodological proposal for accurate economic valuation of the ESFR provided by agroecosystems. To this end, the avoided damage method is used, carrying out hydrological and two-dimensional hydraulic modeling combined with cadastral cartography and a depth-damage function. The model thus constructed allows the quantification of the damage reduction associated with different levels of agroecosystem ESFR provision. The urban settlement composed mainly of the municipality of Los Alcázares, and also the Bahia Bella housing estate, from the municipality of Cartagena (Murcia, south-eastern Spain), is used as a case study, as it is located downstream of a predominantly agricultural area recurrently affected by floods. The results show that the value of the ESFR provided by the service-maximizing agroecosystem in the area, citrus crops, is 22.51 € ha-1 year-1 in the case study area, which is comparable with that of natural ecosystems. Furthermore, relationships were established between intermediate indicators and economic losses which, in addition to facilitating the valuation process, show a limit in the flood regulation provisioning of agroecosystems in the face of the most extreme events. This work shows the magnitude of the ESFR that can be provided by agriculture and enables its valuation in areas with similar characteristics. The information obtained can be incorporated into the decision-making process of land and risk management organizations, enabling them to rationalize agricultural spatial planning.This work was supported by the Spanish Ministry of Science and Education: AgriCambio project (Grant PID2020-114576RB-I00 funded by MCIN/AEI/ 10.13039/501100011033). Víctor Martínez-García acknowledge the financial support from the Spanish Ministry of Education and Personal Training (FPU19/05143)

Hybridization of evolutionary algorithms and local search by means of a clustering method

This paper presents a hybrid evolutionary algorithm (EA) to solve nonlinear-regression problems. Although EAs have proven their ability to explore large search spaces, they are comparatively inefficient in fine tuning the solution. This drawback is usually avoided by means of local optimization algorithms that are applied to the individuals of the population. The algorithms that use local optimization procedures are usually called hybrid algorithms. On the other hand, it is well known that the clustering process enables the creation of groups (clusters) with mutually close points that hopefully correspond to relevant regions of attraction. Local-search procedures can then be started once in every such region. This paper proposes the combination of an EA, a clustering process, and a local-search procedure to the evolutionary design of product-units neural networks. In the methodology presented, only a few individuals are subject to local optimization. Moreover, the local optimization algorithm is only applied at specific stages of the evolutionary process. Our results show a favorable performance when the regression method proposed is compared to other standard methods

Mejora de la aplicación social en Android por Bluetooth Meet Me (versión 2.0)

En este proyecto se ha desarrollado una aplicación en Android para interacción social de corto alcance por bluetooth. La aplicación recoge los datos obtenidos de tu usuario para su interacción con otros usuarios que se comuniquen con él por bluetooth. Depende de los datos de cada usuario saca compatibilidades y las muestra en porcentajes. El usuario se crea mediante unos test y se almacenan en una base de datos en SQLite para que estos sean persistentes. Se han implementado algunas líneas futuras de la anterior aplicación, como los puntos: 3.4. Capturando a los gestores de archivos 3.5. Capturando imágenes con la cámara. El punto 3.6. Localización interna es un extra que no estaba previsto en las líneas futuras, pero se ha implementado debido a lo interesante de la geolocalización interna.Escuela Técnica Superior de Ingeniería de TelecomunicaciónUniversidad Politécnica de Cartagen

Mechanical analysis of Genoa 03 stirling engine

Due to the new technologies development based on renewable sources of energy, in recent years Stirling engines have become very important in the energetic sector. Many of them do not allow the use of fluid lubricants and, thus, the effect of friction losses is important. For this purpose, a mathematical model has been developed based on the force balance in the crankshaft using the pressure distribution in the cylinders. The aim of this work is to characterize the mechanical losses in a Genoa 03 Stirling engine using a numerical model and experimentally via the drag method. The results of this model have been compared with those obtained experimentally on Genoa 03 Stirling engine. In the experimental results, a proportional increase in friction torque due to the average pressure and the speed of the crankshaft is observed. The first of these is caused by an increase of dry friction forces and the second, by the viscous friction between the working fluid and the inner walls of the engine. Also in this paper, irreversible processes in a beta type Stirling engine have been investigated in order to highlight the impact of losses on mechanical power and its performance. This article develops the first study of the mechanical losses of Genoa 03 experimental Stirling engine, which has an output power of 3 kW. Although the model response follows the same trends as the experiments, those simplifications provide errors which become more significant as the engine speed increases.Ministerio de Economía y Competitividad ENE2013-43465-

Un ranking de cajas de ahorros españolas basado en metodología multicriterio

El objetivo de este trabajo es la propuesta de una metodología multicriterio para la obtención de un ranking de Cajas de Ahorros españolas. El principal inconveniente de la mayoría de rankings es su carácter unicriterio, pues se elaboran considerando un solo criterio. Nuestra propuesta hace uso de la técnica de programación por metas, elaborando un ranking de Cajas de Ahorros que considera de forma conjunta diferentes criterios económico-financieros.The aim of this paper is to introduce a multicriteria methodology to calculate a ranking for Spanish Saving Banks. The main shortcoming of most rankings is their unicriteria nature, for they are obtained considering only one criterion. Our proposal employs goal programming, to synthesize one multicriteria ranking for Savings Banks from different financial criteria

La eco-rehabilitación y el desarrollo local: el proyecto ECO-ARQ. Aplicaciones de eco-rehabilitación en la arquitectura tradicional del sudoeste de Europa.

Aplicaciones de ecorehabilitación en arquitectura tradicional española

Non-constant Discounting, Social Welfare and Endogenous Growth with Pollution Externalities

Producción CientíficaWe analyze the effect of non-constant discounting on economic growth and social welfare in an endogenous growth model with pollution externalities. For time-consistent agents, who play a game against their future selves, the balanced growth equilibrium is compared to the case of standard exponential discounting. A decaying instantaneous discount rate leads to slower growth in a centralized economy, while its effect for a competitive economy is ambiguous. Interestingly, when comparing the planned and the competitive equilibria, the assumption of non-constant discounting may imply greater social welfare in the market equilibrium under two conditions. First, the pollution externality on utility must be large with respect to the externality on production, so that the central planner slows down growth below the growth rate in the market economy. Secondly, individuals’ degree of impatience should decrease sharply with the time distance from the present. Concerning policy implications, we observe that under log-utility policies may not be necessary, while for an isoelastic utility with an elasticity lower than one, introducing policy instruments is less effective than under constant discounting.Ministerio de Economía y Competitividad ECO2014-52343-P y Fondos FEDERMinisterio de Economía y Competitividad ECO2017- 82227-P y Fondos FEDERConsejería de Educación, Junta de Castilla y León VA024P17 y fondos FEDERConsejería de Educación, Junta de Castilla y León VA105G18 y fondos FEDE

Determinants of working capital management

This paper analyzes the determinants of working capital management (WCM) for a sample of Spanish firms during the period 1997-2004. We find that firms have a target investment in working capital and that they take decisions in order to achieve this. The results appear to support the hypothesis that the working capital competes with investment in fixed assets for the funds of the firms when they have financial constraints. Finally, we also find that WCM depends on bargaining power and other financial factors such as the availability of internal finance, cost of financing and financial constraints.Research Agency of the Spanish Government ECO2008-06179/ECO

Integrated valuation of semiarid Mediterranean agroecosystem services and disservices

Agroecosystems are anthropised ecosystems where human activities, mainly agricultural practices, affect the innate functioning, leading to the provision of agroecosystem services (AES) and disservices (AEDS). This study presents a novel and integrated economic valuation of the AES and AEDS provided in a water-scarce Mediterranean area (south-eastern Spain), using a discrete choice experiment. The results reveal the social demand for AES and the disutility of AEDS, as well as the non-linearity in marginal utility for some of these AES and AEDS. Food provision, temperature regulation, leisure and recreation and biodiversity are socially perceived as AES. The water supply for irrigation switches between AES and AEDS depending on its provision level, while groundwater pollution is conceived as one of the AEDS. The integrated non-market value of AES and AEDS reaches 794 €/ha/year for the entire agroecosystem. This work provides guidelines for policy makers in the design of socially supported agricultural policies.This work was supported by the Spanish Ministry of Science and Innovation [AGRISERVI: AGL2015-64411-R (MINECO/FEDER)] and the “Fundación Séneca – Region de Murcia” [20912/PI/18]. José A. Zabala acknowledges the financial support from the Spanish Ministry of Education and Personal Training [FPU 16/03473]